A080169
Brian L. Galebach
briang at SEGmail.com
Tue Feb 4 16:38:40 CET 2003
By the way, changing a(4) to 75 would seemingly make the sequence identical
to A000670.
Brian
-----Original Message-----
From: Jens Voss [mailto:jens at voss-ahrensburg.de]
Sent: Tuesday, February 04, 2003 9:17 AM
To: Sequence Fanatics
Subject: A080169
The definition of the new sequence A080169 reads:
> ID Number: A080169
> Sequence: 1,3,13,81,541
> Name: Ways n competitors can rank in a competition, allowing for the
> possibility of ties.
> Example: Three competitors can finish in 13 ways: 1,2,3; 1,3,2; 2,1,3;
2,3,1;
> 3,1,2; 3,2,1; 1,1,3; 2,2,1; 1,3,1; 2,1,2; 3,1,1; 1,2,2;
1,1,1.
> Keywords: more,nonn,new
> Offset: 1
> Author(s): Robert Lozyniak (nothing at example.com), Feb 04 2003
Either I misunderstood this, or I can't count or there's a mistake:
I am getting only 75 for a(4):
The 1 way of all four coming in first,
the 8 ways of having three come in simultaneously and one separately,
the 6 ways of having two pairs,
the 36 ways of having one pair and two separate competitors as well as
the 24 ways of all four coming in separately
-------
sum: 75
Which ones did I miss?
Regards,
Jens
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